Mid-infrared laser absorption spectroscopy of NO2 at elevated temperatures

被引：22

作者：

Sur, Ritobrata ^{[1
]}

Peng, Wen Yu ^{[1
]}

Strand, Christopher ^{[1
]}

Spearrin, R. Mitchell ^{[1
]}

Jeffries, Jay B. ^{[1
]}

Hanson, Ronald K. ^{[1
]}

Bekal, Anish ^{[2
]}

Haider, Purbasha ^{[2
]}

Poonacha, Samhitha P. ^{[2
]}

Vartak, Sameer ^{[2
]}

Sridharan, Arun K. ^{[2
]}

机构：

[1] Stanford Univ, Mech Engn, High Temp Gasdynam Lab, 452 Escondido Mall,Bldg 520, Stanford, CA 94305 USA

[2] Gen Elect India Technol Ctr Pvt Ltd, 122 EPIP,Phase 2,Hoodi Village,Whitefield Rd, Bangalore 560066, Karnataka, India

来源：

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2017年 / 187卷

关键词：

NO2; Spectroscopy; Broadening; Mid-infrared detection; High temperature; WAVELENGTH-MODULATION-SPECTROSCOPY; MU-M; H2O; PARAMETERS; PRESSURE; TRANSITIONS; SPECTRA; BAND; SO2;

D O I：

10.1016/j.jqsrt.2016.10.016

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A mid-infrared quantum cascade laser absorption sensor was developed for in-situ detection of NO2 in high-temperature gas environments. A cluster of spin-split transitions near 1599.9 cm(-1) from the nu(3) absorption band of NO2 was selected due to the strength of these transitions and the low spectral interference from water vapor within this region. Temperature- and species-dependent collisional broadening parameters of ten neighboring NO2 transitions with Ar, O-2, N-2, CO2 and H2O were measured and reported. The spectral model was validated through comparisons with direct absorption spectroscopy measurements of NO2 seeded in various bath gases. The performance of the scanned wavelength modulation spectroscopy (WMS)-based sensor was demonstrated in a combustion exhaust stream seeded with varying flow rates of NO2, achieving reliable detection of 1.45 and 1.6 ppm NO2 by mole at 600 K and 800 K, respectively, with a measurement uncertainty of +/- 11%. 2 sigma noise levels of 360 ppb and 760 ppb were observed at 600 K and 800 K, respectively, in an absorption path length of 1.79 m. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：364 / 374

页数：11

共 32 条

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